About: http://webisa.webdatacommons.org/149125659

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In addition, a sweep gas such as air or nitrogen may emanate adjacent the lens in lens assembly 96 to prevent debris from coating the lens.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com